Welcome to Shopify Community. My name is Olivia and I work here.
Thank you so much for your post. I'd be more than glad to help you troubleshoot this. You mentioned that you are bulk updating product prices, but not all the changes are reflecting on the online store. Can you please clarify the following:
Furthermore, let's have you attempt a few simple troubleshooting steps to rule out any local errors:
With that we should have more context and a better idea for next steps to help you resolve this.
I look forward to your reply,